Inequivalence of statistical ensembles in single molecule measurements

Sinha, Supurna; Samuel, J.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1194

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DC Field	Value	Language
dc.contributor.author	Sinha, Supurna	-
dc.contributor.author	Samuel, J.	-
dc.date.accessioned	2006-05-12T04:29:30Z	-
dc.date.available	2006-05-12T04:29:30Z	-
dc.date.issued	2005-02-24	-
dc.identifier.citation	Physical Review E, 2005, Vol.71, 021104	en
dc.identifier.issn	1539-3755	-
dc.identifier.issn	1550-2376 (online)	-
dc.identifier.uri	http://hdl.handle.net/2289/1194	-
dc.description.abstract	We study the role of fluctuations in single molecule experimental measurements of force-extension (f-zeta) curves. We use the wormlike chain (WLC) model to bring out the connection between the Helmholtz ensemble characterized by the free energy [F(zeta)] and the Gibbs ensemble characterized by the free energy [G(f)]. We consider the rigid rod limit of the WLC model as an instructive special case to bring out the issue of ensemble inequivalence. We point out the need for taking into account the free energy of transition when one goes from one ensemble to another. We also comment on the "phase transition" noticed in an isometric setup for semiflexible polymers and propose a realization of its thermodynamic limit. We present general arguments which rule out nonmonotonic force-extension curves in some ensembles and note that these do not apply to the isometric ensemble.	en
dc.format.extent	58243 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	The American Physical Society	en
dc.relation.uri	http://link.aps.org/abstract/PRE/v71/e021104	en
dc.rights	(2005) by the American Physical Society	en
dc.title	Inequivalence of statistical ensembles in single molecule measurements	en
dc.type	Article	en
Appears in Collections:	Research Papers (TP)

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